Authorities eventually reunited the child with his father, who spoke to WITI.

The baby’s father said his wife has a mental illness and took the baby to the church near the freeway. He said he thinks his wife forgot about the baby and she wandered off.

The father said he noticed his daughter was not home when he saw police in the area.

This is the dad of the baby who was rescued by @RideMCTS bus driver in Dec. The baby was wandering the streets in dangerous temps. He says his wife suffers from mental illness and thinks she brought her baby to a church nearby and forgot about her. https://t.co/t6ffs6tCs4pic.twitter.com/pnDzIq05gO